Optimization for Underhood Flowfield by Matrix Fan

doi:10.7652/xjtuxb201703003

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Optimization for Underhood Flowfield by Matrix Fan

更新时间：2025-07-09

- Optimization for Underhood Flowfield by Matrix Fan
- Vol. 51, Issue 3, Pages: 14-19(2017)
- 作者机构：
  
  同济大学上海市地面交通工具风洞中心,上海,201804
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201703003
  CLC： U467.1
- Online First：10 March 2017，
  
  Published：2017
- 稿件说明：
移动端阅览
Optimization for Underhood Flowfield by Matrix Fan[J]. 2017, 51(3): 14-19.
DOI：

Optimization for Underhood Flowfield by Matrix Fan[J]. 2017, 51(3): 14-19. DOI： 10.7652/xjtuxb201703003.

摘要

发动机舱热管理逐渐成为提高发动机性能的重点问题

为此在传统乘用车的单风扇系统上设计了5种矩阵风扇

并利用数值模拟技术分析了阵型对冷却模块空气侧流场的影响

在此基础上引入导风管进一步研究了冷却模块的空气质量流量及前端热回流效果。结果表明:相比单风扇系统

矩阵风扇型式下通过散热器的空气质量流量有所提升

特别在高速工况下

受冲压气流的作用散热器表面的速度均匀度提高

通过散热器的空气质量流量提升

前端热回流减少; 引入导风管后不仅能够进一步提高车辆在高速工况下通过散热器的进气量

而且可以降低怠速时冷凝器迎风面温度; 结合导风管的矩阵风扇可在不减少冷却模块进气量的前提下

通过降低风扇转速来减少冷却系统的能耗

进而提高燃油经济性

抑制怠速时车辆前端的热回流

改善冷却模块的换热性能。

Abstract

Underhood thermal management has gradually become the key problem for improving the engine performance. Based on single fan configuration of a traditional passenger car

five matrix fan configurations are totally designed

and the effects of different configurations on the air-side flowfield of cooling module are numerically simulated. Introducing an air duct

the effects of air mass flowrate and hot air recirculation on the front end are further analyzed. The results indicate that the matrix fan configurations can increase the mass flowrate through the radiator compared with the original single fan configuration

especially in high-speed condition. With the ram air effect

the velocity uniformity is improved

the air mass flowrate is enhanced

and the hot air recirculation is also lessened. Setting air duct heightens the mass flowrate through the radiator at high speed

and lowers the average temperature on windward surface of condenser at idle. In conclusion

matrix fan with air-duct reduces power consumption of cooling system without the penalty of air intake capacity of front end by decreasing the fan rotation speed

and then improves the fuel economy and the heat transfer performance of cooling module by suppressing the hot air recirculation at idle.

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Keywords

references

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